Note: Descriptions are shown in the official language in which they were submitted.
CA 02597186 2007-08-10
FASTENING MEMBER AND EXTERNAL WALL CONSTRUCTION STRUCTURE
USING THE SAME
FIELD OF THE INVENTION
The present invention relates to a fastening member for fixing a siding board
whose lateral joint portions are disposed in a portion where no vertical
member is
provided in a framework of a building to the above framework, and an external
wall
construction structure using the same.
DESCRIPTION OF THE RELATED ART
The framework construction method has been conventionally employed as a
construction method of buildings. In this framework construction method,
furring strip
backing set is normally built as modules of 455 mm. Specifically, the
intervals of posts
and studs to which the furring strips are applied are set to 455 mm. This is a
basic
dimension commonly employed in the Japanese wooden stand-alone house building
field.
For this reason, the dimensions of siding board products fixed are designed
and produced to have the vertical width dimension of the integer multiple of
455 mm to
fit the above basic dimension of the furring strip backing set (e.g., 455 mm x
4 = 1820
mm).
However, in recent years, there are many cases where the intervals of posts
and studs are different from the above-mentioned basic dimension, 455 mm. For
example, the intervals of 500 mm as in meter modules and 24 inches (610 mm)
are
often employed. In such a case, when such siding boards are fixed to posts and
studs,
portions where the left and right ends of the above siding boards cannot be
disposed on
the posts and studs are disadvantageously formed. Since these portions are not
supported by frameworks such as posts and studs, the fixing force of the
siding boards
to the frameworks may not be sufficiently ensured.
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CA 02597186 2007-08-10
As a solution for such problems, Japanese Unexamined Laid-open Patent
Publication No. 2006-37567 disclosed a fastening member and external wall
construction structure using the same, and a method of attaching an external
wall. As
shown in Fig. 15, the patent publication suggests a technique of fastening
siding board
to a framework 2 using a fastening member 9 fixed to a vertical member (post,
stud) 21.
This fastening member 9, as shown in Fig. 15, has a long fixing plate portion
11 fixed to at least one vertical member 21, and is provided with a first
fastening portion
12 for engaging the upper end portion in the lateral joint portions of the
siding board and
supporting and engaging the lower end portion of the siding board disposed
thereabove
at the left end of the front surface of the long fixing plate portion 11, a
vertical rising
portion 13 for preventing displacement disposed in the lateral joint portions
mentioned
above below the first fastening portion 12, and a second fastening portion 14
for
engaging the upper end portion of the siding board and supporting and engaging
the
lower end portion of the siding board disposed thereabove at the right end of
the front
surface of the long fixing plate portion 11.
The vertical rising portion 13 for preventing displacement of the fastening
member 9 mentioned above is brought into contact with right side edge of the
siding
board disposed on the left side thereof, and is disposed in the upper side
portion and
lower side portion of the lateral joint portion of the neighboring siding
boards to engage
the two siding boards therebelow and the two siding boards thereabove by the
first
fastening portion 12 and the second fastening portion 14.
At this time, the above fastening member 9 is fixed to the above vertical
member 21 with nails 91.
However, as shown in Fig. 13, when the fastening member 9 is fixed to the
vertical member 21 with a moisture-permeable waterproof sheet 7 placed
therebetween,
variations in application result in waviness in the moisture-permeable
waterproof sheet
and other problems,whereby ensuring a space formed between the rear side
surface 36
of the siding board 3 and the moisture-permeable waterproof sheet 7, that is,
a
ventilation space 8, is disadvantageously disabled.
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Herein, the moisture-permeable waterproof sheet 7 serves as a waterproof
layer which prevents backward permeation (permeation into the building) of
rainwater
which has entered into the ventilation space 8 and a condensate generated on
the rear
side surface 36 of the siding board 3, but discharges the rainwater and
condensate
downwardly. The moisture-permeable waterproof sheet 7 also serves as a
moisture-
permeable layer which allows water vapor generated indoors (inside the
building) to
flow forwardly (into the ventilation space 8).
As shown in the Fig., if the moisture-permeable waterproof sheet 7 is slackly
hanged, the ventilation space 8 is closed and a space for the moisture inside
the
ventilation space 8 to move upwardly is not ensured, whereby the moisture is
stagnated
inside the ventilation space 8. Similarly, rainwater and condensate entering
into the
ventilation space 8 flow down and thus becomes difficult to be discharged to
the
outdoor, and water stagnates inside the ventilation space 8. This stagnation
of
moisture and water causes the rear side surface 36 of the siding board 3 to
absorb
moisture and water. Consequently, problems such as warping, enlargement and
shrinkage of the siding board 3 are disadvantageously caused. This problem is
especially serious in fiber reinforced cement siding type siding boards.
Meanwhile, as shown in Fig. 14, to sufficiently ensure the ventilation space
8,
the structure in which the fastening member 9 and the furring strips 22 are
used in
combination is possible. In this structure, the fastening member 9 is fixed to
the vertical
member 21 with the moisture-permeable waterproof sheet 7 and the furring
strips 22
placed therebetween, and the sufficient ventilation space 8 is ensured between
the
moisture-permeable waterproof sheet 7 and the rear side surface 36 of the
siding board
3, excluding the portions of the furring strips 22 fixed in the vertical
direction. However,
the furring strips 22 need to be fixed to the vertical member 21 in advance
before the
fastening member 9 is fixed. Accordingly, working man-hours and material costs
are
disadvantageously increased. That is, in such application, a number of the
furring strips
22 having a standard dimension need to be prepared, and a working step of
fixing the
furring strips 22 to the vertical member 21 with nails and the like are also
necessary.
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SUMMARY OF THE INVENTION
The present invention was made to solve the above-mentioned known
problems, and an object of the invention is to provide a fastening member
which can
ensure a sufficient ventilation space without using furring strips, fix a
siding board
whose lateral joint portions are disposed in a portion where no vertical
member is
provided with sufficient strength, and prevent 'displacement' in the vertical
direction in
one step, and an external wall construction structure using the same.
The object of the present invention mentioned above is achieved by a
fastening member for fixing on a framework of a building a siding board whose
lateral
joint portions are disposed in a portion where no vertical member is provided
on the
framework,
the fastening member comprising a long fixing plate portion fixed on at least
one vertical member,
a first fastening portion having a fixture for supporting and engaging an
upper
end portion of the lateral joint portions of the siding board and a lower end
portion of the
siding board thereabove on the front surface of the long fixing plate portion,
a vertical rising portion for preventing displacement disposed in the lateral
joint portions of the siding board below the first fastening portion,
a second fastening portion having a fixture for engaging the upper end
portion of the siding board other than the lateral joint portions and for
supporting and
engaging the lower end portion of the siding board other than the lateral
joint portions
on the front surface of the long fixing plate portion, and
a ventilating spacer provided in the first fastening portion and second
fastening portion and nipped between the long fixing plate portion and each of
the
fastening portions, respectively.
The object of the present invention mentioned above is effectively achieved
by a fastening member in which the ventilating spacer has a bent portion which
is
perpendicularly bent from each side of an approximately rectangle-shaped metal
plate
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rearwardly, and an opening portion in an approximate center, and further the
bent
portion has a reinforcing rib which is the metal plate locally deformed and a
reinforcing
protrusion in the opening portion.
Moreover, the object of the present invention mentioned above is further
effectively achieved by a fastening member in which the ventilating spacer has
a drain
hole in the bent portion.
The object of the present invention mentioned above is further effectively
achieved by a fastening member in which
a portion around the opening portion of the long fixing plate portion is
protruded, the opening portion of the ventilating spacer and the opening
portion of each
fixture are aligned relative to the opening portion, and
the bent portion of the ventilating spacer and the edge of the reinforcing
protrusion are brought into contact with the long fixing plate portion, and in
a state that
the fixture is in contact with the ventilating spacer,
the raised portion around the opening portion in the long fixing plate portion
projects forwardly beyond the opening portion of each fixture, and this
protruding
portion is rearwardly bent on the front surface of each fixture and pressed
against the
front surface portion of the long fixing plate portion, whereby the
ventilating spacer and
each fixture are integrally fixed to the long fixing plate portion.
The object of the present invention mentioned above is further effectively
achieved by a fastening member in which the first fastening portion has a
plurality of
flange portions which are formed by subjecting a portion of the long fixing
plate portion
to a cutting and bending process, and and the fixture is mounted on the flange
portions
in direct contact with the flange portions.
The object of the present invention mentioned above is further effectively
achieved by a fastening member in which the first fastening portion is
provided at one
end of the long fixing plate portion, and the second fastening portion is
provided at the
other end of the long fixing plate portion.
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The object of the present invention mentioned above is further effectively
achieved by a fastening member which further has a third fastening portion
having a
shape and function similar to those of the second fastening portion.
The object of the present invention mentioned above is further effectively
achieved by a fastening member in which a fixture constituting the first
fastening portion
is a fixture having a stopper for preventing displacement which comprises a
vertical
rising portion for preventing displacement integrally formed thereon.
The object of the present invention mentioned above is further effectively
achieved by a fastening member in which the long fixing plate portion has a
rib portion
protruding forwardly in the lateral direction and a lower side bent portion
bent forwardly
from the lower side of the long fixing plate portion formed thereon.
The object of the present invention mentioned above is further effectively
achieved by an external wall construction structure using the fastening
member.
The object of the present invention mentioned above is further effectively
achieved by an external wall construction structure wherein the framework has
a
vertical member disposition span of 500 to 610 mm, and the long fixing plate
portion
has a horizontal length of 540 to 650 mm.
Effects of the Invention
According to the fastening member of the present invention and the external
wall construction structure using the same, a step of fixing furring strips
for providing a
ventilation space on the framework in advance is unnecessary, thereby
improving
operation efficiency. Moreover, since furring strips are unnecessary, material
costs can
be greatly reduced. Furthermore, a sufficient ventilation space can be ensured
by a
ventilating spacer provided on the fastening member in advance, and even in a
case
where the lateral joint portions of the siding board are disposed in a portion
where there
are no vertical member, which is a framework, is provided because of the
limitation of
the construction structure and application position and it is therefore
difficult to fix the
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lateral joint portions of the siding board to a vertical member, the siding
board whose
lateral joint portions are disposed in a portion where no vertical member is
provided can
be fixed with sufficient strength. Moreover, because of the unique
configuration of the
ventilating spacer, external forces transmitted to the siding board such as
wind pressure
can be transmitted smoothly to a vertical member, which is a framework, via
the
ventilating spacer. In addition, the 'displacement' of the siding board in the
vertical
direction can be prevented. Further, in the upper end portion of the lateral
joint portions
of the siding board, when the fastening member is disposed on the upper end
portions
of the horizontally adjacent siding boards, the siding boards can be engaged
while the
panels can be aligned on a horizontal straight line by simultaneously bringing
the
fastening member into contact with the upper end portions of the siding
boards.
Therefore, displacement between the joints of the horizontally adjacent siding
boards in
the horizontal direction can be reduced, and the aesthetic quality of the
finished
external walls can be improved. Moreover, in the lower end portion of the
siding board
disposed above the siding board mentioned above, the fastening member supports
the
lower end portion of the siding board on a straight line in the horizontal
direction,
whereby the influence of the unevenness of the framework and a plurality of
vertical
members in the longitudinal direction can be reduced and the siding boards can
be
engaged without warping. This can also improve the aesthetic quality.
Thus, the fastening member according to the present invention and the
external wall construction structure using the same
can provide the following great advantages: a sufficient ventilation space
can be ensured between a siding board and the framework; installment is easy
and
installment costs can be reduced; the fixing strength of the siding board is
good and
therefore the effect of preventing displacement is high; and
displacement or warping of joints can be prevented, which can also improve
the aesthetic quality.
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BRIEF DESCRIPTION OF THE DRAWINGS
The preferred embodiments of the present invention are shown by way of
example, and not limitation, in the accompanying figures, in which:
Fig. 1 is a front view of an external wall construction structure of the
present
invention.
Fig. 2 is a front view of the fastening member of the present invention.
Fig. 3 is a bottom view of the fastening member of the present invention.
Fig. 4 is a front view of the external wall construction structure around the
fastening member of the present invention.
Fig. 5 is a cross-sectional view of the external wall construction structure
taken along line A-A in Fig. 2 of the present invention.
Fig. 6 is a cross sectional view of the external wall construction structure
taken along line B-B of Fig. 2 of the present invention.
Fig. 7 shows the first ventilating spacer of the present invention, and (A) is
a
perspective view, (a) is a front view, (b) is a bottom view, (c) is a right
side elevational
view, (d) is a cross-sectional view taken along line D-D, (e) is a cross-
sectional view
taken along line E-E, and (f) is a back side view.
Fig. 8 shows the second ventilating spacer of the present invention, and (a)
is a front view, (b) is a bottom view, (c) is a right side elevational view,
(d) is a cross-
sectional view taken along line D-D, (e) is a cross-sectional view taken along
line E-E,
and (f) is a back side view.
Fig. 9 is a front view of the long fixing plate portion before the fixture is
attached of the present invention.
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Fig. 10 is an illustrative drawing of the ventilating spacer position of the
present invention.
Fig. 11 is an illustrative drawing of the swaged portion of the present
invention.
Fig. 12 shows the long fixing plate portion of the present invention, and (a)
is
a left side elevational view, (b) is a a cross-sectional view taken along line
B-B in Fig.
9,(c) is a cross-sectional view taken along line C-C in Fig. 9, and (d) is a
cross-sectional
view taken along line D-D in Fig. 9.
Fig. 13 is a perpendicular cross-sectional view of the external wall
construction structure using a fastening member of a conventional invention.
Fig. 14 is a perpendicular cross-sectional view of an external wall
construction structure using furring strips and a fastening member of a
conventional
invention.
Fig. 15 is a front view of an external wall construction structure using a
fastening member of a conventional invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIEMENTS
[Embodiment]
The best embodiments of the present invention will be described with
reference to Figs. 1 to 12.
A fastening member 1 of the present invention is, as shown in Fig. 1, a
member for fixing a siding board 3 whose lateral joint portions 39 are
disposed in a
portion in a framework 2 of a building where no vertical member 21 is provided
to the
above framework 2.
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The above fastening member 1 has, as shown in Fig. 2, a long fixing plate
portion 11 fixed to at least one vertical member 21 (not shown).
On the front surface of the long fixing plate portion 11, as shown in Figs. 2
and 3, a first fastening portion 12 is provided at its left end; a vertical
rising portion 13
for preventing displacement is provided therebelow; a second fastening portion
14 is
provided at its right end; and a third fastening portion 15 is provided in an
approximately
middle position between the first and second fastening portions 12, 14.
The first fastening portion 12, as shown in Figs. 4 and 5, engages an upper
end portion 31 in the lateral joint portions 39 of the siding boards 3, 3
disposed
thereunder, and supports and engages a lower end portion 32 of the siding
boards 3, 3
disposed thereon.
The vertical rising portion 13 for preventing displacement is brought into
contact with the right side edge (side end surface 33) of the siding board 3
disposed to
the lower left of the first fastening portion 12.
The second fastening portion 14, as shown in Fig. 6, engages the upper end
portion 31 of the siding boards 3, 3 in the portion other than the lateral
joint portions
39,and supports and engages the lower end portion 32 of the siding boards 3, 3
disposed thereabove.
Subsequently, the detailed constitution of this fastening member 1will be
described.
As shown in Fig. 7, the first ventilating spacer 17 provided in the first
fastening portion 12 has bent portions 171 which are perpendicularly bent
rearwardly
from each side of the approximately rectangle-shaped metal plate. In the bent
portions
171, a number of reinforcing ribs 172 are formed by locally deforming the
metal plate.
Moreover, in the opening portion in an approximately center of the first
ventilating
spacer 17, a reinforcing protrusion 173 is formed by a burring process.
CA 02597186 2007-08-10
Further, drain holes 174 are formed in a lower bent portion 171 of the first
ventilating spacer 17. The drain holes 174 are formed by cutting out portions
of the
lower bent portion 171.
As shown in Fig. 8, the second ventilating spacer 18 provided on the second
fastening portion 14 and the third fastening portion 15 also have bent
portions 181
which are perpendicularly bent rearwardly from each side of the approximately
rectangle-shaped metal plate. Moreover, a number of reinforcing ribs 182 are
formed in
the bent portions 181 by locally deforming the metal plate. Further, a
reinforcing
protrusion 183 is also formed in the opening portion in an approximately
center of the
second ventilating spacer 18 by a burring process.
Further, drain holes 184 are also formed in the lower bent portion 181 of the
second ventilating spacer 18 in a similar manner. The drain holes 184 are
formed by
cutting out portions of the lower bent portion 181.
As shown in Fig. 10, the first ventilating spacer 17 and second ventilating
spacer 18 are provided on the front surface of the long fixing plate portion
11 in contact
therewith. The bent portions 171 and reinforcing protrusion 173 shown in Fig.
7, and
the bent portions 181 and reinforcing protrusion 183 shown in Fig. 8 have
dimensions
(dimensions of the total thickness) in the longitudinal direction depending on
the
dimension of a required ventilation space to function as a spacer. Moreover,
since the
first ventilating spacer 17 and the second ventilating spacer 18 are in
contact with the
long fixing plate portion 11, the vertical and horizontal dimensions of the
first and
second ventilating spacers 17 and 18 correspond to those of a rib portion
(described
later), and fixtures 4 and 5 (described later), respectively, so that they do
not interfere
with the rib portion which projects forwardly beyond the long fixing plate
portion 11 and
that their contact with the fixtures 4 having a stopper for prevention
displacement and a
fixture 5 mounted on the long fixing plate portion 11 is ensured.
As shown in Figs. 2 and 3, this fastening member 1 is fixed to a front portion
of the long fixing plate portion 11, respectively, in a state that the first
ventilating spacer
17 is nipped between the fixture *4 having a stopper for preventing
displacement which
comprises the above-mentioned first fastening portion 12 and the vertical
rising portion
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13 for preventing displacement formed integrally and the long fixing plate
portion 11 and
the second ventilating spacer 18 is nipped between the fixture 5 constituting
the above-
mentioned second fastening portion 14 and the fixture 5 constituting the above
third
fastening portion 15 and the long fixing plate portion 11.
As shown in Fig. 2, the fixture 4 having a stopper for preventing
displacement and the fixture 5 are fixed by swaging to the long fixing plate
portion 11 in
a state of nipping the first ventilating spacer 17 and the second ventilating
spacer 18,
respectively, in a swaged portion 16.
Specifically, as shown in Fig. 11, two or more portions between the long
fixing plate portion 11 and the fixture 4 having a stopper for preventing
displacement or
the fixture 5 are subjected to a burring-swaging process. The burring-swaging
process
can prevent loosening better than fastening with screws, and can be fixed
strongly once
the process is finished. In the burring-swaging process, firstly, the opening
portion
projecting beyond the long fixing plate portion 11 and the opening portion of
the first
ventilating spacer 17 are aligned, and then the opening portion of the first
ventilating
spacer 17 and the opening portion of the fixture 4 having a stopper for
preventing
displacement are aligned. Similarly, the opening portion projecting beyond the
long
fixing plate portion 11 and the opening portion of the second ventilating
spacer 18 are
aligned, and then the opening portion of the second ventilating spacer 18 and
the
opening portion of the fixture 5 are aligned. Subsequently, a portion around
the
opening portion of the long fixing plate portion 11 is caused to project
forwardly beyond
the opening portions of the fixture 4 having a stopper for preventing
displacement and
the fixture 5, and the portion which is beyond the opening portions is bend on
the front
surface in a manner of nipping the fixture 4 having a stopper for preventing
displacement and the fixture 5 in a state that the first ventilating spacer 17
and second
ventilating spacer 18 are nipped, and is press-fitted to form the swaged
portion 16.
This opening portion projecting beyond the long fixing plate portion 11
mentioned above, the reinforcing protrusion 173 of the first ventilating
spacer 17, and
the reinforcing protrusion 183 of the second ventilating spacer 18 are
provided to
prevent local deformation of the first ventilating spacer 17 and the second
ventilating
spacer 18 and further increase their strength. They are also provided to
increase
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adhesion to the long fixing plate portion 11 and smoothly transmit the stress
which is
transmitted from the siding board to the fixture 4 having a stopper for
preventing
displacement and the fixture 5 to the long fixing plate portion 11.
As shown in Fig. 9, a plurality of upper side rib portions 111 and lower side
rib portions 112 projecting forwardly are formed on the long fixing plate
portion 11 in the
lateral direction, and a lower side bent portion 113 which is perpendicularly
bent
forwardly from the lower side of the long fixing plate portion 11 is formed
(refer to Fig.
12). These upper side rib portions 111, lower side rib portions 112 and lower
side bent
portion 113 are provided to enhance the strength of the entire long fixing
plate portion
11 and smoothly transmit the stress which is transmitted from the siding board
to the
fixture 4 having a stopper for preventing displacement and the fixture 5 to
the vertical 21,
which is a framework.
The long fixing plate portion 11 has a horizontal length of 650 mm. This
length can cope with modules having a length of 500 mm to 610 mm.
In the long fixing plate portion 11, as shown in Figs. 2 and 9, the rib
portions
111 are not formed in a portion in which the fixture 5 is disposed to provide
break
portions 116 which are gaps in the rib portions 112. Accordingly, as shown in
Fig. 10,
the second ventilating spacer 18 is mounted on the long fixing plate portion
11 in a
manner of contacting the same, and further the fixture 5 is mounted on the
second
ventilating spacer 18 in a manner of contacting the same. Moreover, the upper
side rib
portions 111 are projecting in such a manner that their cross sections are
approximately
triangle-shaped, and a number of nail holes 114 are formed on its upper slope
at
regular intervals (e.g., 15 mm interval) in the lateral direction.
A plurality of screw holes (bores) 115 are formed at regular intervals in the
lateral direction (e.g., 15 mm interval) between the rib portions 111 and the
rib portions
112. Therefore, the fastening member 1 can be securely screwed onto posts and
stud
portions with which the long fixing plate portion 11 is brought into contact.
The lower side bent portion 113, as shown in Fig. 9, is continuously formed
in an inner portion in the vicinity of the left end of the long fixing plate
portion 11
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CA 02597186 2007-08-10
excluding the portion in which the fixture 4 having a stopper for preventing
displacement
is disposed.
The second ventilating spacer 18 is mounted in the vicinity of this lower side
bent portions 113 (refer to Fig. 10).
Furthermore, as shown in Figs. 9 and 12, a plurality of flange portions 117
are formed in an inner portion in the vicinity of the left end of the long
fixing plate portion
11 excluding the portion in which the fixture 4 having a stopper for
preventing
displacement is disposed. The first ventilating spacer 17 is mounted on the
long fixing
plate portion 11 in a position which does not interfere with the upper side
rib portions
111 and lower side rib portions 112 in a manner of contacting the long fixing
plate
portion 11. Furthermore, the fixture 4 having a stopper for preventing
displacement is
mounted on the first ventilating spacer 17 in a manner of contacting the same.
However, the first ventilating spacer 17 is not mounted only on the front
surface of the
flange portion 117, but the fixture 4 having a stopper for preventing
displacement is
directly mounted on the flange portion 117 in a manner of contacting the same.
The flange portions 117 are formed by subjecting portions of the long fixing
plate portion 11 to a cutting and bending process, and are for transmitting
the stress of
the fixture 4 having a stopper for preventing displacement directly to the
long fixing
plate portion 11 in a portion different from with the first ventilating spacer
17. Herein, if
there were no flange portions 117 and unexpectedly great stress is transmitted
from the
fixture 4 having a stopper for preventing displacement only to the first
ventilating spacer
17, because of an insufficiency of the area for the first ventilating spacer
17 and the
fixture 4 having a stopper for preventing displacement to adherence to each
other, the
fixture 4 having a stopper for preventing displacement may be locally
deformed. The
purpose of providing the flange portions 117 is to increase this area for
adheresion,
prevent deformation of the fixture 4 having a stopper for preventing
displacement, and
increase its strength.
That is, the flange portions 117 are provided to increase safety by smoothly
transmitting the stress transmitted from the fixture 4 having a stopper for
preventing
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displacement to the long fixing plate portion 11, not only via the first
ventilating spacer
17 but also via the flange portions 117.
In this specification, the term "front" means the outside of the building, and
the term "rear" means the inside of the building. Moreover, regarding the
above
fastening member and other components, expressions such as "front", "rear",
"above",
"below", "horizontal" and "perpendicular ", in a state of being attached to
the framework,
are used, among others. Moreover, the terms "left" and "right" means the
directions
which are "left" and "right ", respectively, when the design side of the
external wall is
viewed from the front (refer to Figs. 1 and 4).
The framework consists of a plurality of vertical members provided at a span
of 610 mm. The framework is, for example, a wooden framework, and may be a
framework of a framework construction structure, a framework of platform frame
construction structure and various other frameworks.
Although a sufficient ventilation space can be ensured by directly fixing the
fastening member to the vertical member, but when a larger ventilation space
is to be
ensured, the fastening member may be indirectly fixed to the vertical members
via
backing materials such as furring strips.
The framework to which the fastening member is fixed preferably has the
disposition span of the vertical members of 500 to 610 mm, and the long fixing
plate
portion preferably has a horizontal length of 540 to 650 mm.
In this case, the fastening member can be easily fixed to at least one
vertical
member.
When the disposition span of the vertical members is more than 610 mm and
1000 mm or less, the long fixing plate portion preferably has a horizontal
length of 1000
mm or less.
Examples of the siding board include a fiber reinforced cement siding type
siding board.
CA 02597186 2007-08-10
The materials consituting the fastening member are metallic materials such
as molten zinc-aluminium-magnesium alloy-plated steel plate and stainless
steel. The
long fixing plate portion, the fixture having a stopper for preventing
displacement and
the fixture are formed by subjecting a steel plate to cutting, bending and
other
processes.
The ventilating spacer can be any solid substance which can be nipped
between the long fixing plate portion and the fixtures, and may be any
material such as
metals, resins, hard rubbers, and ceramics, as long as it is not easily
deformed, broken,
deteriorated over time or decayed even if it receives an external force
(stress).
Considering strength and durability, for example, metal plates of iron-plated
and molten
zinc-aluminium-magnesium alloy-plated steel plates and stainless steel plates
and parts
produced by bending these metal plates, and laminated metal plates are
preferable.
The thickness of metal plates themselves constituting the ventilating spacers
may be
any thickness as long as they are not easily deformed or broken even when the
external force is applied thereto. For example, 1 mm or more is desirable in
case of a
metal plate such as iron.
Further, it is desirable that one or more drain holes are provided in a
portion
of one of the left, right and lower bent portions or the combinations thereof.
In this case, discharging water entering into the ventilating spacer in the
lateral direction and downwardly is facilitated.
However, when the long fixing plate portion and most of the back side of the
ventilating spacer are adhered, it is desirable to provide a groove which
serves as a
drain hole on the back side of the ventilating spacer downwardly.
The flange portion of the long fixing plate portion preferably is formed by
cutting and bending a portion of the long fixing plate portion and has a
configuration
which allows contact with the fixture, but it can also have a configuration in
which a
portion of the long fixing plate portion is projected in the shape of a jut by
a pressing
process and burring process.
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It is preferable that the first fastening portion is provided at one end of
the
long fixing plate portion, and the second fastening portion is provided at the
other end of
the long fixing plate portion.
In this case, the fastening member can be provided in the upper end portion
and lower end portion of the siding board more stablely.
The fastening member preferably has the third fastening portion provided
with a ventilating spacer portion having a configuration and function similar
to the
second fastening portion.
In this case, the fixing strength of the siding board can be improved.
The long fixing plate portion is preferably provided with a rib portion
projecting forwardly in the lateral direction and a lower side bent portion
bent forwardly
from the lower side of the long fixing plate portion.
In this case, the strength of the long fixing plate portion can be ensured.
It is preferable to provide a gap between the lower side bent portion and the
second ventilating spacer of the long fixing plate portion.
In this case, water entering into the the second ventilating spacer flows down
the drain hole, and then flows fowardly and downwardly in the lateral
direction of the
lower side bent portion through the gap,whereby stagnation of water can be
prevented
and generation of rust on the fastening member can be inhibited
The long fixing plate portion is preferably provided with an opening portion
projecting forwardly.
In the first fastening portion, when the first ventilating spacer and the
fixture
having a stopper for preventing displacement are fixed to the long fixing
plate portion,
the opening portion of the long fixing plate portion projecting forwardly and
the opening
portion of the first of the ventilating spacer are aligned and then the
opening portion of
the first ventilating spacer and the opening portion of the fixture having a
stopper for
preventing displacement are aligned, whereby positioning of the first
ventialting spacer
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and the fixture having a stopper for preventing displacement in the vertical
and lateral
directions in their attachment can be easily carried out only by aligning
these opening
portions.
Similarly in the second fastening portion, when the second ventilating spacer
and the fixture are fixed to the long fixing plate portion,the opening portion
of the long
fixing plate portion projecting forwardly and the opening portion of the
second
ventilating spacer are aligned and then the opening portion of the second
ventilating
spacer and the opening portion of the fixture are aligned, whereby positioning
of the
second ventilating spacer and the fixture in the vertical and lateral
directions in their
attachment can be easily carried out only by aligning these opening portions.
It is preferable that the fastening member has the third fastening portion
provided with a ventilating spacer portion having a configuration and function
similar to
the second fastening portion and the third fastening portion engages the upper
end
portion of the siding board in the portion other than the lateral joint
portions and
supports and engages the lower end portion.
In this case, the fixing strength of the siding board can be improved, and the
construction structure of external walls having excellent durability can be
obtaind.
It is desirable that the fastening member has such a thickness and
configuration that the long fixing plate portion is not easily deformed and
the first
fastening portion, the second fastening portion and the third fastening
portion are
disposed on a straight line in the horizontal and front-and-rear direction.
In this case, in the lateral joint portions of the siding boards, the
horizontally
adjacent upper end portions of the siding boards are simultaneously engaged on
a
straight line and the lower end portions of the siding boards disposed above
those
siding boards are supported on a straight line, whereby displacement in the
joints of the
siding boards can be reduced and the siding boards can be engaged without
warping,
thereby obtanining external wall construction structure with an improvied
aesthetic
quality.
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